Fix typo on prompt of 'adr help generate'

npryce#137

src/adr-generate

@@ -6,7 +6,7 @@ eval "$("$(dirname "$0")/adr-config")"
 ##
 ## Generates summary documentation about the architecture decision records
 ## that is typically fed into the tool chain for publishing a project's 
-## documentatation.
+## documentation.
 ##
 ## To list the report types that can be generated, run:
 ##